An automated microfluidic colourimetric sensor applied in situ to determine nitrite concentration

作者：Beaton Alexander D; Sieben Vincent J; Floquet Cedric F A; Waugh Edward M; Bey Samer Abi Kaed; Ogilvie Iain R G; Mowlem Matthew C^*; Morgan Hywel

来源：Sensors and Actuators B: Chemical , 2011, 156(2): 1009-1014.

DOI：10.1016/j.snb.2011.02.042

• Griess nitrite detection
• Automated PMMA microfluidic chip
• Integrated colourimetric sensor
• Spectrophotometry
• Environment

A stand-alone sensor system with integrated sub-systems is demonstrated. The system is portable and capable of in situ reagent-based nutrient analysis. The system is based on a low cost optical detection method, together with an automated microfluidic delivery system that is able to detect nitrite with a limit of detection (LOD) of 15 nM. The sensor was operated in situ at Southampton Dockhead for 57 h (December 2010) and 375 measurements were taken.

• 出版日期2011-8